John joseph lappif



(No Model.) u J. J. LAPPIN.

BRAKE SHOE.. K N0. 292,827. 1- @Patented Feb. 5,1884.,v

I N. PETERS. PlwlLithegmdw-r. waminglw. D c,

` @NWI-37 STATES rmermet.

JonNlJosnPH LrrIN, ony TORONTO, oNrARId-CANAA.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 292,827, dated February 5, 1884.

Application filed May 25,1883. (No model.)

T0 all whom, it may concern n Be it `known that I, JOHN JOSEPH LAPPIN, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have invented new and useful Improvements in Brake- Shoes for Braking Car-Wheels of Railroad- Irains and other Car-Vheels; and I do hereby declare that the following is a full, clear, and exact description thereof, whereby others skilled in the art may make and use the same, reference being had to the accompanying drawings and to this specification.

My invention has for its object the construction of a brake-shoe which will have greater durability than the brake-shoes now in use, and constructed without the embedding of pieces of other metalin the face of the shoe, which has been done by other manufacturers in order to obtain greater durability in the wear of the same. n

My invention is an improvement on the brake-shoes now in use, both from its greater durability and from its not skidding the wheels when braking the train.

My invention consists in the hardening, by means of chills in the process of casting, certain parts of the face'of the shoe, and leaving` other parts thereof soft/7 and in certain proportions, in order to produce an effective brake-shoe, and also durable, and to operate effectively in stopping the trains Without skidding the wheels, as hereinafter more fully described.

In the accompanying drawings, Figurel is an edge View of my brake-shoe. Fig. 2 is an end view of the same. Fig. 3 is an edge View of the pattern and chills. Fig. 4 is a transverse section through the line a b in Fig. 3, showing the chill as it is placed on the pattern previous to being covered up in the sand',

of the same; D, the unchilled portions; E, the

pattern from which the shoe is molded in, the sand, c, the chills, and c projections on the same.

Referring toFig. 1, it will be observed that the chilled parts C in the face of the shoe are about of equal surface to the unchilled parts D; but this proportion may be varied when found necessary.

Referring to Fig. 3, it willbe found that the chills c are laid into recesses in the face ofthe pattern E, securing thel chills sidewise therein, so that they will not shift in the ramming of the sand carefully between and around the `6o pattern and the chills; and Fig. '4 shows the manner in which the chills are prevented from moving edgewise in the ramming previously referred to by the projections c passing up each edge of the shoe-pattern, so that in ramming the sand and withdrawing the, pattern from the mold and the pouring of the molten metal, therein the chills will remain in their position, and will remain attached to the shoe until it is being dressed in the cleaning, when 7o they fall off, leaving the shoe when cleaned ready for attachment to the brake and for use.

I do not limit myself to the number of chills, as larger wheels'require a larger shoe.

The art or process of the manufacture of my brake-shoe, as previously stated, is different from other known methods now in use.

In the manufacture of my shoe I do not embed strips of other metal in thel face of the shoe. My process is entirely different from 8o the embedding process, which I will recapitnlate in part, so as to give a more particular description of my invention. I A

In'the processof casting my brake-shoe in the foundry from the molten pig-iron I place 8 5 in the pattern E, when lying on the sand prior to making the mold,certain pieces of metal suitable for my purpose, and place the same from an eighth of an inch to three-eighths deep in the'face of the pattern, which pieces 9o have projections c' on each side, so as to embrace the edges of the pattern E, by which means, when the sand is carefully rammed in between and around the pieces c, and also around the pattern, the latter is removed with- 9 5 out disturbing the pieces of metal aforesaid, which remainin the mold, and when the molten metal is poured therein they act as chills and harden certain portions of the face of the shoeviz., those portions in which they come in roo immediate contact with'and produce a new character in the metal, and which is well adapted for brake-shoes. The durability is act bed on the rim of the Wheel before the increased, and they do not skid. the Wheels. chilled portions come in contact therewith, 1o

Having thus described my invention, I and thereby protecting the shoe, substantially 5 A brake-shoe With chilled portions C in the JOHN JOSEPH LAPPIN.

face thereof, and soft projecting portions D XVtnesses: between the chilled portions, which soft p0r- THo. VOODBRIDGE,

tions will Wear and bring the shoe to un ex- HARRY VELLS. 

